They became parents for the first time in July and moved into their renovated Kensington Palace apartment in the autumn, while William left his job in the military and took an agricultural management course at Cambridge University.

Their successful trip to New Zealand and Australia - which included a playdate for George in Wellington, a visit to Uluru at sunset, meeting lifesavers on Manly Beach in Sydney and paying tribute to fallen soldiers on Anzac Day - was one of the longest, high profile overseas royal tours for many years.

Traditionally couples exchange gifts made of leather to mark their third wedding anniversary.

Both her £3,600 Ballon Bleu de Cartier watch, which is embedded with a sapphire to match her engagement ring, and a diamond eternity band, which she wears on her wedding finger, are thought to have been gifts from William.